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    Subject[PATCH 08/16] page-flags: define behavior of Xen-related flags on compound pages
    Date
    PG_pinned and PG_savepinned are about page table's pages which are never
    compound.

    I'm not so sure about PG_foreign, but it seems we shouldn't see compound
    pages there too.

    Let's use NO_COMPOUND for all of them.

    Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
    ---
    include/linux/page-flags.h | 9 ++++++---
    1 file changed, 6 insertions(+), 3 deletions(-)

    diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h
    index d41c63b566b8..19373c98d08a 100644
    --- a/include/linux/page-flags.h
    +++ b/include/linux/page-flags.h
    @@ -282,9 +282,12 @@ PAGEFLAG(Active, active, HEAD) __CLEARPAGEFLAG(Active, active, HEAD)
    __PAGEFLAG(Slab, slab, NO_TAIL)
    __PAGEFLAG(SlobFree, slob_free, NO_TAIL)
    PAGEFLAG(Checked, checked, NO_COMPOUND) /* Used by some filesystems */
    -PAGEFLAG(Pinned, pinned, ANY) TESTSCFLAG(Pinned, pinned, ANY) /* Xen */
    -PAGEFLAG(SavePinned, savepinned, ANY); /* Xen */
    -PAGEFLAG(Foreign, foreign, ANY); /* Xen */
    +
    +/* Xen */
    +PAGEFLAG(Pinned, pinned, NO_COMPOUND) TESTSCFLAG(Pinned, pinned, NO_COMPOUND)
    +PAGEFLAG(SavePinned, savepinned, NO_COMPOUND)
    +PAGEFLAG(Foreign, foreign, NO_COMPOUND)
    +
    PAGEFLAG(Reserved, reserved, ANY) __CLEARPAGEFLAG(Reserved, reserved, ANY)
    PAGEFLAG(SwapBacked, swapbacked, ANY)
    __CLEARPAGEFLAG(SwapBacked, swapbacked, ANY)
    --
    2.1.4


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